#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int My_strlen(char* arr)
{
	int i = 0;
	int count = 0;
	for (i = 0; arr[i] != '\0'; i++)
	{
		count ++ ;
	}
	return count;
}
int main()
{
	char arr[] = { "hello" };
	int count=My_strlen(arr);
	printf("count=%d\n", count);
	return 0;
}